Department of Orthodontics, School of Dentistry, University of Athens, Greece.
Eur J Orthod. 2013 Feb;35(1):82-6. doi: 10.1093/ejo/cjr048. Epub 2011 Apr 4.
The aim of this study was to assess the effect of bracket type on the labiopalatal forces and moments generated in the sagittal plane. Incognito™ lingual brackets (3M Unitek), STb™ lingual brackets (Light Lingual System; ORMCO), and conventional 0.018 inch slot brackets (Gemini; 3M Unitek) were bonded on three identical maxillary acrylic resin models, with a palatally displaced right lateral incisor. The transfer trays for the indirect bonding of the lingual brackets were constructed in certified laboratories. Each model was mounted on the orthodontic measurement and simulation system and ten 0.013 inch CuNiTi wires were used for each bracket type. The wire was ligated with elastomerics and each measurement was repeated once after re-ligation. The labiopalatal forces and the moments in the sagittal plane were recorded on the right lateral incisor. One-way analysis of variance and post hoc Scheffe pairwise comparisons were used to assess the effect on bracket type on the generated forces and moments. The magnitude of forces ranged from 1.62, 1.27, and 1.81 N for the STb, conventional, and Incognito brackets, respectively; the corresponding moments were 2.01, 1.45, and 2.19 N mm, respectively. Bracket type was a significant predictor of the generated forces (P < 0.001) and moments (P < 0.001). The produced forces were different among all three bracket types, whereas the generated moments differed between conventional and lingual brackets but not between lingual brackets.
本研究旨在评估托槽类型对上唇腭向力和力矩在矢状面的影响。隐适美（3M Unitek）舌侧托槽、STb 舌侧托槽（Light Lingual System；ORMCO）和传统 0.018 英寸槽托槽（Gemini；3M Unitek）被黏结于三个相同的上颌丙烯酸树脂模型上，每个模型上均有一颗腭向错位的右侧侧切牙。用于间接黏结舌侧托槽的转移托盘在经过认证的实验室中制作。每个模型都安装在正畸测量和模拟系统上，每个托槽类型使用 10 根 0.013 英寸的 CuNiTi 丝。用弹性体结扎丝结扎每根丝，重新结扎后再重复测量一次。在上侧切牙上记录唇腭向力和矢状面力矩。采用单向方差分析和事后 Scheffe 两两比较来评估托槽类型对上产生的力和力矩的影响。力的大小分别为 STb、传统和隐适美托槽的 1.62、1.27 和 1.81 N；相应的力矩分别为 2.01、1.45 和 2.19 Nmm。托槽类型是产生力（P < 0.001）和力矩（P < 0.001）的重要预测因素。所有三种托槽类型之间产生的力不同，而传统托槽和舌侧托槽之间产生的力矩不同，但舌侧托槽之间没有差异。
